JPH044416U - - Google Patents
Info
- Publication number
- JPH044416U JPH044416U JP4410090U JP4410090U JPH044416U JP H044416 U JPH044416 U JP H044416U JP 4410090 U JP4410090 U JP 4410090U JP 4410090 U JP4410090 U JP 4410090U JP H044416 U JPH044416 U JP H044416U
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- transistor
- terminal
- power source
- mute
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Amplifiers (AREA)
Description
第１図はこの考案に係る車載用音響機器の制御
回路の実施例を示す回路図である。
主な符号の説明、１……電源、３……ミユート
ドライバ用のトランジスタ、４……制御用のトラ
ンジスタ、６……バツクアツプ電源、９……スイ
ツチ。
FIG. 1 is a circuit diagram showing an embodiment of a control circuit for a vehicle-mounted audio device according to this invention. Explanation of main symbols: 1...power supply, 3...transistor for mute driver, 4...transistor for control, 6...backup power supply, 9...switch.
Claims (1)
の抵抗器と、前記第１の抵抗器の電位差に基づき
ミユート回路を駆動するためのミユートドライバ
用のトランジスタと、前記ミユートドライバ用の
トランジスタを制御するためエミツタをグランド
に、コレクタを第２の抵抗器を介して前記第１の
抵抗器の他方の端子に接続する制御用のトランジ
スタと、バツクアツプ電源と、前記バツクアツプ
電源に一方の端子を接続した第３の抵抗器と、前
記制御用のトランジスタのベースにカソードを接
続したダイオードと、前記第３の抵抗器の他方の
端子と前記ダイオードのアノードとの接続線路と
グランドとの間に設けたスイツチとで構成したこ
とを特徴とする車載用音響機器の制御回路。 a power source and a first terminal having one terminal connected to the power source;
a resistor, a transistor for a mute driver for driving a mute circuit based on the potential difference between the first resistor, and a transistor for controlling the mute driver, the emitter of which is grounded, and the collector of which is connected to a second transistor. a control transistor connected to the other terminal of the first resistor via the resistor; a backup power source; a third resistor having one terminal connected to the backup power source; A vehicle-mounted device comprising: a diode having a cathode connected to the base of a transistor; and a switch provided between a connection line between the other terminal of the third resistor and the anode of the diode and ground. Control circuit for audio equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990044100U JP2503791Y2 (en) | 1990-04-26 | 1990-04-26 | In-vehicle audio equipment control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990044100U JP2503791Y2 (en) | 1990-04-26 | 1990-04-26 | In-vehicle audio equipment control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH044416U true JPH044416U (en) | 1992-01-16 |
| JP2503791Y2 JP2503791Y2 (en) | 1996-07-03 |
Family
ID=31557099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990044100U Expired - Lifetime JP2503791Y2 (en) | 1990-04-26 | 1990-04-26 | In-vehicle audio equipment control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2503791Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6370717U (en) * | 1986-10-28 | 1988-05-12 |
-
1990
- 1990-04-26 JP JP1990044100U patent/JP2503791Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6370717U (en) * | 1986-10-28 | 1988-05-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2503791Y2 (en) | 1996-07-03 |
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